Jack Mundey (born 17 October 1929 in Malanda, Queensland) is an Australian union and environmental activist.
He came to prominence during the 1970s for leading the New South Wales Builders' Labourers Federation (BLF) in the famous green bans, whereby the BLF led a successful campaign to protect the built and natural environment of Sydney from excessive and inappropriate development.
Mundey is now Patron of the Historic Houses Association of Australia.